1156530011 has 8 divisors (see below), whose sum is σ = 1423421664. Its totient is φ = 915056640.

The previous prime is 1156529993. The next prime is 1156530031. The reversal of 1156530011 is 1100356511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156530011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156530031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6354470 + ... + 6354651.

It is an arithmetic number, because the mean of its divisors is an integer number (177927708).

Almost surely, 2^1156530011 is an apocalyptic number.

1156530011 is a deficient number, since it is larger than the sum of its proper divisors (266891653).

1156530011 is a wasteful number, since it uses less digits than its factorization.

1156530011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12709141.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1156530011 is about 34007.7933862225. The cubic root of 1156530011 is about 1049.6688331281.

Adding to 1156530011 its reverse (1100356511), we get a palindrome (2256886522).

The spelling of 1156530011 in words is "one billion, one hundred fifty-six million, five hundred thirty thousand, eleven".